Evaluate:
sin 30⁰ cos 45⁰ − cos 30 ⁰ sin 45⁰
sin 30⁰ cos 45⁰ − cos 30 ⁰ sin 45⁰=12∗22−32∗22=−2(3−1)4.=\frac{1}{2}*\frac{\sqrt{2}}{2}-\frac{\sqrt{3}}{2}*\frac{\sqrt{2}}{2}=-\frac{\sqrt{2}(\sqrt{3}-1)}{4}.=21∗22−23∗22=−42(3−1).
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